Hey,
On 07/13/2016 01:32 PM, Baptiste Clenet wrote:
> I've got a chip which needs precise timing to be read. A year ago, I
> was able to communicate with this chip but now, even if I go as fast I
> can it seems that timing have increased with same source code.
> So is there a way to force the CPU to do only one task at the time for
> the duration of the function. Can we tell the scheduler to stop other thread?
two things might interrupt:
1. a thread with higher priority
This can be solved by increasing the priority of the thread talking to
your code, possibly to the maximum.
(beware: lower priority value means higher priority)
2. interrupts
If an interrupt messes with your timing, that can be prevented by
disabling interrupts for a time-critical section:
unsigned state = irq_disable()
/* timing critical code */
irq_restore(state);
Kaspar
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